Concrete insert



March 4, 1924.;

1 M. E. CHASE CONCRETE INSERT Filed Feb. 14. 1921 I Patented Mar. 4*, 192 1..

masses M'AURICE E. CHASE, F CAIVIBRIDGE, MASSACHUSETT$.

CONCRETE INSERT.

Application filed February 14, 1921. Serial No. 1%,635.

To all whom it may concern:

Be it known that I, MAURICE E. CHASE, a citizen of the United States, and a resident of the city of Cambridge, in the county of Middlesexand Commonwealth of Massachusetts, have invented certain new and useful improvements in Concrete Inserts, of which the following is a full, clear, and exact specification.

1n the erection of concrete edifices, it is customary to insert in the walls and ceilings certain attaching devices, which, after the cement has hardened, can be utilized for the suspension of piping and other elements.

Such devices are usually nailed upon the flooring or platform which is to be used for the temporary support of the concrete dur ing its hardening, so that after the plat forms are removed, the attaching devices will remain embedded in the ceilings and ready for use. I have found them in practice to be uncertain, liable to become displaced and incapable of convenient attachment, and incapable of adjustment.

My invention has for its object the construction of a device of the kind which can be fastened upon the platform with a certainty of its remaining in place, which will support the piping without danger of detachment, which permits of a considerable lateral variation in its connection with the pipes, from which the piping can be readily released whenever desired, which can be employed for the suspension of partitions, and perform the other functions hereinafter set forth.

Fig. 1 is a sectional elevation showing one of my inserts fastened upon a platform. Fig. 2 is a sectional view of the insert with the platform taken down, and embedded in the concrete, and showing it supporting a suspension device. Fig. 3 is a plan view of the device with its cover removed. Fig. 4! a perspective view of another form of the i suspension device.

The concrete insert embodying my inven tion consists of a small metal box 1 shown in the drawings in approximately full size, with its bottom considerably narrower than its top both in order to be readily cast, and to strongly retain itself in the concrete against any downward pull.

Through the bottom of the box 1 is a longitudinally disposed slot 2 adjacent the side 3, the closed portion 1 of the bottom being of considerable thickness and formed with a rounded surface 5 at the side of the slot '2. Along the lateral edge of each side 3 and 6 at the top thereof, is an inclined flange 7, and slidably engaging these flanges is a cover 9 having inwardly bent edges 10 fitting the flanges; the purpose of the cover being to close the box against the entrance of dirt and concrete. Slight depressions 11 near the ends, as shown in Fig. 5, retain the cover in place.

Through the thickened bottom portion a are screw holes 12 through which screws 13 are inserted for fastening the box to the concretesupporting platform 14, as illustrated in Fig. 1. After the boxes 1 have thus been placed, and the covers 9 returned thereto, the concrete is poured upon the platform to the desired depth, and after it has suitably hardened, the platform planking 14 is removed, the screws 13 tearing out therefrom, leaving the structure as illustrated in Fig. 2.

Then, or before the cover 9 has been replaced, a roller 15 is introduced within each box, each end resting upon a ledge 16 at the end of the slot 2. When the lance-shaped head 17 of a suspension device 19 is inserted through the slot 2 sufficiently to permit the roller 15 to come between its neck 20 and the side 3 of the box, then the roller 15 becomes a clutch acting to prevent the withdrawal of the suspension device 19 no matter how hard the pull thereon. The suspension device can have a screw eye or hook 21 screwed into its lower end as indicated in Fig. 2, or it can be formed with a hook 22 made integral therewith, as in Fig. 1.

The boxes being set in the ceiling with their slots 2 disposed transversely to the line of the boxes, the suspensions 19 can be easily slid to one side or the other in order that the pipe supported thereby will be in perfect alinement.

If it is desired to remove the piping and the suspensions, all that needs to be done is to press the latter upward, and then by pushing the roller 15 up and holding it, as by means of a finger, the suspensions can each be readily withdrawn from its box.

What I claim is:

1. A concrete insert comprising a box having an elongated slot through its bottom, a suspension device having a head adapted to be introduced through said slot and to be slid to different points thereof, and a loosely disposed elongated roller reaching from end to end of said box and to be inserted into the box through said slot, the box having means for holding the roller from dropping through said slot when the roller is parallel therewith, said roller acting to lock said sus pension device ithin said box by engagement with its head.

2. A concrete insert comprising an elongated box having a longitudinally disposed slot through its bottom, a suspension device having a lance-shaped head and contracted neck, an elongated roller loose in said box, and means for preventing said roller from dropping from saidbox when in a horizontal'position, whereby to engage said head and retain the suspension device at difi'erent points in saidbox.

f3. A concrete insert comprising a box narrower at its bottom than .atits top and hav ing a longitudinally disposed slot through its bottom near one side thereof, the portion metres of the bottom at the other side of said slot being thickened and provided with screw holes, the surface of said thickened portion adjacent the slot being rounded, a suspension device having a head easily introduced through said slot, and a roller adapted to come between said head and a side of the slot.

4:. A concrete insert comprising an elongated box having a widened top and a longitudinally disposed slot through its bottom,

the slot having a ledge at each end, a roller terminally resting upon said ledges, and a suspension device having a head adapted to be introduced through said slot and to be 

